physiology
/ˌfɪzɪˈɔlədʒɪ; fɪzɪ`ɑlədʒɪ/ n[U]
(a) scientific study of the normal functions of living things 生理学
reproductive physiology 生殖生理学.
(b) way in which the body of a particular living thing functions 生理机能
the physiology of the snake 蛇的生理机能.